drivers/video/sh_mobile_lcdcfb.c

   1 /*
   2  * SuperH Mobile LCDC Framebuffer
   3  *
   4  * Copyright (c) 2008 Magnus Damm
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/mm.h>
  15 #include <linux/clk.h>
  16 #include <linux/pm_runtime.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/vmalloc.h>
  21 #include <linux/ioctl.h>
  22 #include <linux/slab.h>
  23 #include <linux/console.h>
  24 #include <linux/backlight.h>
  25 #include <linux/gpio.h>
  26 #include <video/sh_mobile_lcdc.h>
  27 #include <asm/atomic.h>
  28
  29 #include "sh_mobile_lcdcfb.h"
  30 #include "sh_mobile_meram.h"
  31
  32 #define SIDE_B_OFFSET 0x1000
  33 #define MIRROR_OFFSET 0x2000
  34
  35 /* shared registers */
  36 #define _LDDCKR 0x410
  37 #define _LDDCKSTPR 0x414
  38 #define _LDINTR 0x468
  39 #define _LDSR 0x46c
  40 #define _LDCNT1R 0x470
  41 #define _LDCNT2R 0x474
  42 #define _LDRCNTR 0x478
  43 #define _LDDDSR 0x47c
  44 #define _LDDWD0R 0x800
  45 #define _LDDRDR 0x840
  46 #define _LDDWAR 0x900
  47 #define _LDDRAR 0x904
  48
  49 /* shared registers and their order for context save/restore */
  50 static int lcdc_shared_regs[] = {
  51         _LDDCKR,
  52         _LDDCKSTPR,
  53         _LDINTR,
  54         _LDDDSR,
  55         _LDCNT1R,
  56         _LDCNT2R,
  57 };
  58 #define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs)
  59
  60 #define MAX_XRES 1920
  61 #define MAX_YRES 1080
  62
  63 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
  64         [LDDCKPAT1R] = 0x400,
  65         [LDDCKPAT2R] = 0x404,
  66         [LDMT1R] = 0x418,
  67         [LDMT2R] = 0x41c,
  68         [LDMT3R] = 0x420,
  69         [LDDFR] = 0x424,
  70         [LDSM1R] = 0x428,
  71         [LDSM2R] = 0x42c,
  72         [LDSA1R] = 0x430,
  73         [LDSA2R] = 0x434,
  74         [LDMLSR] = 0x438,
  75         [LDHCNR] = 0x448,
  76         [LDHSYNR] = 0x44c,
  77         [LDVLNR] = 0x450,
  78         [LDVSYNR] = 0x454,
  79         [LDPMR] = 0x460,
  80         [LDHAJR] = 0x4a0,
  81 };
  82
  83 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
  84         [LDDCKPAT1R] = 0x408,
  85         [LDDCKPAT2R] = 0x40c,
  86         [LDMT1R] = 0x600,
  87         [LDMT2R] = 0x604,
  88         [LDMT3R] = 0x608,
  89         [LDDFR] = 0x60c,
  90         [LDSM1R] = 0x610,
  91         [LDSM2R] = 0x614,
  92         [LDSA1R] = 0x618,
  93         [LDMLSR] = 0x620,
  94         [LDHCNR] = 0x624,
  95         [LDHSYNR] = 0x628,
  96         [LDVLNR] = 0x62c,
  97         [LDVSYNR] = 0x630,
  98         [LDPMR] = 0x63c,
  99 };
 100
 101 #define START_LCDC      0x00000001
 102 #define LCDC_RESET      0x00000100
 103 #define DISPLAY_BEU     0x00000008
 104 #define LCDC_ENABLE     0x00000001
 105 #define LDINTR_FE       0x00000400
 106 #define LDINTR_VSE      0x00000200
 107 #define LDINTR_VEE      0x00000100
 108 #define LDINTR_FS       0x00000004
 109 #define LDINTR_VSS      0x00000002
 110 #define LDINTR_VES      0x00000001
 111 #define LDRCNTR_SRS     0x00020000
 112 #define LDRCNTR_SRC     0x00010000
 113 #define LDRCNTR_MRS     0x00000002
 114 #define LDRCNTR_MRC     0x00000001
 115 #define LDSR_MRS        0x00000100
 116
 117 static const struct fb_videomode default_720p = {
 118         .name = "HDMI 720p",
 119         .xres = 1280,
 120         .yres = 720,
 121
 122         .left_margin = 220,
 123         .right_margin = 110,
 124         .hsync_len = 40,
 125
 126         .upper_margin = 20,
 127         .lower_margin = 5,
 128         .vsync_len = 5,
 129
 130         .pixclock = 13468,
 131         .refresh = 60,
 132         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
 133 };
 134
 135 struct sh_mobile_lcdc_priv {
 136         void __iomem *base;
 137         int irq;
 138         atomic_t hw_usecnt;
 139         struct device *dev;
 140         struct clk *dot_clk;
 141         unsigned long lddckr;
 142         struct sh_mobile_lcdc_chan ch[2];
 143         struct notifier_block notifier;
 144         unsigned long saved_shared_regs[NR_SHARED_REGS];
 145         int started;
 146         int forced_bpp; /* 2 channel LCDC must share bpp setting */
 147         struct sh_mobile_meram_info *meram_dev;
 148 };
 149
 150 static bool banked(int reg_nr)
 151 {
 152         switch (reg_nr) {
 153         case LDMT1R:
 154         case LDMT2R:
 155         case LDMT3R:
 156         case LDDFR:
 157         case LDSM1R:
 158         case LDSA1R:
 159         case LDSA2R:
 160         case LDMLSR:
 161         case LDHCNR:
 162         case LDHSYNR:
 163         case LDVLNR:
 164         case LDVSYNR:
 165                 return true;
 166         }
 167         return false;
 168 }
 169
 170 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 171                             int reg_nr, unsigned long data)
 172 {
 173         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 174         if (banked(reg_nr))
 175                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 176                           SIDE_B_OFFSET);
 177 }
 178
 179 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 180                             int reg_nr, unsigned long data)
 181 {
 182         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 183                   MIRROR_OFFSET);
 184 }
 185
 186 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 187                                     int reg_nr)
 188 {
 189         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 190 }
 191
 192 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 193                        unsigned long reg_offs, unsigned long data)
 194 {
 195         iowrite32(data, priv->base + reg_offs);
 196 }
 197
 198 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 199                                unsigned long reg_offs)
 200 {
 201         return ioread32(priv->base + reg_offs);
 202 }
 203
 204 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 205                           unsigned long reg_offs,
 206                           unsigned long mask, unsigned long until)
 207 {
 208         while ((lcdc_read(priv, reg_offs) & mask) != until)
 209                 cpu_relax();
 210 }
 211
 212 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 213 {
 214         return chan->cfg.chan == LCDC_CHAN_SUBLCD;
 215 }
 216
 217 static void lcdc_sys_write_index(void *handle, unsigned long data)
 218 {
 219         struct sh_mobile_lcdc_chan *ch = handle;
 220
 221         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
 222         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 223         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 224         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 225 }
 226
 227 static void lcdc_sys_write_data(void *handle, unsigned long data)
 228 {
 229         struct sh_mobile_lcdc_chan *ch = handle;
 230
 231         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
 232         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 233         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 234         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 235 }
 236
 237 static unsigned long lcdc_sys_read_data(void *handle)
 238 {
 239         struct sh_mobile_lcdc_chan *ch = handle;
 240
 241         lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
 242         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 243         lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 244         udelay(1);
 245         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 246
 247         return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
 248 }
 249
 250 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 251         lcdc_sys_write_index,
 252         lcdc_sys_write_data,
 253         lcdc_sys_read_data,
 254 };
 255
 256 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 257 {
 258         if (atomic_inc_and_test(&priv->hw_usecnt)) {
 259                 pm_runtime_get_sync(priv->dev);
 260                 if (priv->dot_clk)
 261                         clk_enable(priv->dot_clk);
 262         }
 263 }
 264
 265 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 266 {
 267         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 268                 if (priv->dot_clk)
 269                         clk_disable(priv->dot_clk);
 270                 pm_runtime_put(priv->dev);
 271         }
 272 }
 273
 274 static int sh_mobile_lcdc_sginit(struct fb_info *info,
 275                                   struct list_head *pagelist)
 276 {
 277         struct sh_mobile_lcdc_chan *ch = info->par;
 278         unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
 279         struct page *page;
 280         int nr_pages = 0;
 281
 282         sg_init_table(ch->sglist, nr_pages_max);
 283
 284         list_for_each_entry(page, pagelist, lru)
 285                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
 286
 287         return nr_pages;
 288 }
 289
 290 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 291                                        struct list_head *pagelist)
 292 {
 293         struct sh_mobile_lcdc_chan *ch = info->par;
 294         struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
 295
 296         /* enable clocks before accessing hardware */
 297         sh_mobile_lcdc_clk_on(ch->lcdc);
 298
 299         /*
 300          * It's possible to get here without anything on the pagelist via
 301          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 302          * invocation. In the former case, the acceleration routines are
 303          * stepped in to when using the framebuffer console causing the
 304          * workqueue to be scheduled without any dirty pages on the list.
 305          *
 306          * Despite this, a panel update is still needed given that the
 307          * acceleration routines have their own methods for writing in
 308          * that still need to be updated.
 309          *
 310          * The fsync() and empty pagelist case could be optimized for,
 311          * but we don't bother, as any application exhibiting such
 312          * behaviour is fundamentally broken anyways.
 313          */
 314         if (!list_empty(pagelist)) {
 315                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
 316
 317                 /* trigger panel update */
 318                 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 319                 if (bcfg->start_transfer)
 320                         bcfg->start_transfer(bcfg->board_data, ch,
 321                                              &sh_mobile_lcdc_sys_bus_ops);
 322                 lcdc_write_chan(ch, LDSM2R, 1);
 323                 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 324         } else {
 325                 if (bcfg->start_transfer)
 326                         bcfg->start_transfer(bcfg->board_data, ch,
 327                                              &sh_mobile_lcdc_sys_bus_ops);
 328                 lcdc_write_chan(ch, LDSM2R, 1);
 329         }
 330 }
 331
 332 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 333 {
 334         struct fb_deferred_io *fbdefio = info->fbdefio;
 335
 336         if (fbdefio)
 337                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 338 }
 339
 340 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 341 {
 342         struct sh_mobile_lcdc_priv *priv = data;
 343         struct sh_mobile_lcdc_chan *ch;
 344         unsigned long tmp;
 345         unsigned long ldintr;
 346         int is_sub;
 347         int k;
 348
 349         /* acknowledge interrupt */
 350         ldintr = tmp = lcdc_read(priv, _LDINTR);
 351         /*
 352          * disable further VSYNC End IRQs, preserve all other enabled IRQs,
 353          * write 0 to bits 0-6 to ack all triggered IRQs.
 354          */
 355         tmp &= 0xffffff00 & ~LDINTR_VEE;
 356         lcdc_write(priv, _LDINTR, tmp);
 357
 358         /* figure out if this interrupt is for main or sub lcd */
 359         is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
 360
 361         /* wake up channel and disable clocks */
 362         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 363                 ch = &priv->ch[k];
 364
 365                 if (!ch->enabled)
 366                         continue;
 367
 368                 /* Frame Start */
 369                 if (ldintr & LDINTR_FS) {
 370                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
 371                                 ch->frame_end = 1;
 372                                 wake_up(&ch->frame_end_wait);
 373
 374                                 sh_mobile_lcdc_clk_off(priv);
 375                         }
 376                 }
 377
 378                 /* VSYNC End */
 379                 if (ldintr & LDINTR_VES)
 380                         complete(&ch->vsync_completion);
 381         }
 382
 383         return IRQ_HANDLED;
 384 }
 385
 386 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 387                                       int start)
 388 {
 389         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 390         int k;
 391
 392         /* start or stop the lcdc */
 393         if (start)
 394                 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
 395         else
 396                 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
 397
 398         /* wait until power is applied/stopped on all channels */
 399         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 400                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 401                         while (1) {
 402                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
 403                                 if (start && tmp == 3)
 404                                         break;
 405                                 if (!start && tmp == 0)
 406                                         break;
 407                                 cpu_relax();
 408                         }
 409
 410         if (!start)
 411                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 412 }
 413
 414 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 415 {
 416         struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
 417         unsigned long h_total, hsync_pos, display_h_total;
 418         u32 tmp;
 419
 420         tmp = ch->ldmt1r_value;
 421         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
 422         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
 423         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
 424         tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
 425         tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
 426         tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
 427         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
 428         lcdc_write_chan(ch, LDMT1R, tmp);
 429
 430         /* setup SYS bus */
 431         lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
 432         lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
 433
 434         /* horizontal configuration */
 435         h_total = display_var->xres + display_var->hsync_len +
 436                 display_var->left_margin + display_var->right_margin;
 437         tmp = h_total / 8; /* HTCN */
 438         tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
 439         lcdc_write_chan(ch, LDHCNR, tmp);
 440
 441         hsync_pos = display_var->xres + display_var->right_margin;
 442         tmp = hsync_pos / 8; /* HSYNP */
 443         tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
 444         lcdc_write_chan(ch, LDHSYNR, tmp);
 445
 446         /* vertical configuration */
 447         tmp = display_var->yres + display_var->vsync_len +
 448                 display_var->upper_margin + display_var->lower_margin; /* VTLN */
 449         tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
 450         lcdc_write_chan(ch, LDVLNR, tmp);
 451
 452         tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
 453         tmp |= display_var->vsync_len << 16; /* VSYNW */
 454         lcdc_write_chan(ch, LDVSYNR, tmp);
 455
 456         /* Adjust horizontal synchronisation for HDMI */
 457         display_h_total = display_var->xres + display_var->hsync_len +
 458                 display_var->left_margin + display_var->right_margin;
 459         tmp = ((display_var->xres & 7) << 24) |
 460                 ((display_h_total & 7) << 16) |
 461                 ((display_var->hsync_len & 7) << 8) |
 462                 hsync_pos;
 463         lcdc_write_chan(ch, LDHAJR, tmp);
 464 }
 465
 466 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 467 {
 468         struct sh_mobile_lcdc_chan *ch;
 469         struct sh_mobile_lcdc_board_cfg *board_cfg;
 470         unsigned long tmp;
 471         int bpp = 0;
 472         unsigned long ldddsr;
 473         int k, m;
 474         int ret = 0;
 475
 476         /* enable clocks before accessing the hardware */
 477         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 478                 if (priv->ch[k].enabled) {
 479                         sh_mobile_lcdc_clk_on(priv);
 480                         if (!bpp)
 481                                 bpp = priv->ch[k].info->var.bits_per_pixel;
 482                 }
 483         }
 484
 485         /* reset */
 486         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
 487         lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
 488
 489         /* enable LCDC channels */
 490         tmp = lcdc_read(priv, _LDCNT2R);
 491         tmp |= priv->ch[0].enabled;
 492         tmp |= priv->ch[1].enabled;
 493         lcdc_write(priv, _LDCNT2R, tmp);
 494
 495         /* read data from external memory, avoid using the BEU for now */
 496         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
 497
 498         /* stop the lcdc first */
 499         sh_mobile_lcdc_start_stop(priv, 0);
 500
 501         /* configure clocks */
 502         tmp = priv->lddckr;
 503         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 504                 ch = &priv->ch[k];
 505
 506                 if (!priv->ch[k].enabled)
 507                         continue;
 508
 509                 m = ch->cfg.clock_divider;
 510                 if (!m)
 511                         continue;
 512
 513                 if (m == 1)
 514                         m = 1 << 6;
 515                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 516
 517                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
 518                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 519                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 520         }
 521
 522         lcdc_write(priv, _LDDCKR, tmp);
 523
 524         /* start dotclock again */
 525         lcdc_write(priv, _LDDCKSTPR, 0);
 526         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
 527
 528         /* interrupts are disabled to begin with */
 529         lcdc_write(priv, _LDINTR, 0);
 530
 531         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 532                 ch = &priv->ch[k];
 533
 534                 if (!ch->enabled)
 535                         continue;
 536
 537                 sh_mobile_lcdc_geometry(ch);
 538
 539                 /* power supply */
 540                 lcdc_write_chan(ch, LDPMR, 0);
 541
 542                 board_cfg = &ch->cfg.board_cfg;
 543                 if (board_cfg->setup_sys)
 544                         ret = board_cfg->setup_sys(board_cfg->board_data, ch,
 545                                                    &sh_mobile_lcdc_sys_bus_ops);
 546                 if (ret)
 547                         return ret;
 548         }
 549
 550         /* word and long word swap */
 551         ldddsr = lcdc_read(priv, _LDDDSR);
 552         if  (priv->ch[0].info->var.nonstd)
 553                 lcdc_write(priv, _LDDDSR, ldddsr | 7);
 554         else {
 555                 switch (bpp) {
 556                 case 16:
 557                         lcdc_write(priv, _LDDDSR, ldddsr | 6);
 558                         break;
 559                 case 24:
 560                         lcdc_write(priv, _LDDDSR, ldddsr | 7);
 561                         break;
 562                 case 32:
 563                         lcdc_write(priv, _LDDDSR, ldddsr | 4);
 564                         break;
 565                 }
 566         }
 567
 568         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 569                 unsigned long base_addr_y;
 570                 unsigned long base_addr_c = 0;
 571                 int pitch;
 572                 ch = &priv->ch[k];
 573
 574                 if (!priv->ch[k].enabled)
 575                         continue;
 576
 577                 /* set bpp format in PKF[4:0] */
 578                 tmp = lcdc_read_chan(ch, LDDFR);
 579                 tmp &= ~0x0003031f;
 580                 if (ch->info->var.nonstd) {
 581                         tmp |= (ch->info->var.nonstd << 16);
 582                         switch (ch->info->var.bits_per_pixel) {
 583                         case 12:
 584                                 break;
 585                         case 16:
 586                                 tmp |= (0x1 << 8);
 587                                 break;
 588                         case 24:
 589                                 tmp |= (0x2 << 8);
 590                                 break;
 591                         }
 592                 } else {
 593                         switch (ch->info->var.bits_per_pixel) {
 594                         case 16:
 595                                 tmp |= 0x03;
 596                                 break;
 597                         case 24:
 598                                 tmp |= 0x0b;
 599                                 break;
 600                         case 32:
 601                                 break;
 602                         }
 603                 }
 604                 lcdc_write_chan(ch, LDDFR, tmp);
 605
 606                 base_addr_y = ch->info->fix.smem_start;
 607                 base_addr_c = base_addr_y +
 608                                 ch->info->var.xres *
 609                                 ch->info->var.yres_virtual;
 610                 pitch = ch->info->fix.line_length;
 611
 612                 /* test if we can enable meram */
 613                 if (ch->cfg.meram_cfg && priv->meram_dev &&
 614                                 priv->meram_dev->ops) {
 615                         struct sh_mobile_meram_cfg *cfg;
 616                         struct sh_mobile_meram_info *mdev;
 617                         unsigned long icb_addr_y, icb_addr_c;
 618                         int icb_pitch;
 619                         int pf;
 620
 621                         cfg = ch->cfg.meram_cfg;
 622                         mdev = priv->meram_dev;
 623                         /* we need to de-init configured ICBs before we
 624                          * we can re-initialize them.
 625                          */
 626                         if (ch->meram_enabled)
 627                                 mdev->ops->meram_unregister(mdev, cfg);
 628
 629                         ch->meram_enabled = 0;
 630
 631                         if (ch->info->var.nonstd) {
 632                                 if (ch->info->var.bits_per_pixel == 24)
 633                                         pf = SH_MOBILE_MERAM_PF_NV24;
 634                                 else
 635                                         pf = SH_MOBILE_MERAM_PF_NV;
 636                         } else {
 637                                 pf = SH_MOBILE_MERAM_PF_RGB;
 638                         }
 639
 640                         ret = mdev->ops->meram_register(mdev, cfg, pitch,
 641                                                 ch->info->var.yres,
 642                                                 pf,
 643                                                 base_addr_y,
 644                                                 base_addr_c,
 645                                                 &icb_addr_y,
 646                                                 &icb_addr_c,
 647                                                 &icb_pitch);
 648                         if (!ret)  {
 649                                 /* set LDSA1R value */
 650                                 base_addr_y = icb_addr_y;
 651                                 pitch = icb_pitch;
 652
 653                                 /* set LDSA2R value if required */
 654                                 if (base_addr_c)
 655                                         base_addr_c = icb_addr_c;
 656
 657                                 ch->meram_enabled = 1;
 658                         }
 659                 }
 660
 661                 /* point out our frame buffer */
 662                 lcdc_write_chan(ch, LDSA1R, base_addr_y);
 663                 if (ch->info->var.nonstd)
 664                         lcdc_write_chan(ch, LDSA2R, base_addr_c);
 665
 666                 /* set line size */
 667                 lcdc_write_chan(ch, LDMLSR, pitch);
 668
 669                 /* setup deferred io if SYS bus */
 670                 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
 671                 if (ch->ldmt1r_value & (1 << 12) && tmp) {
 672                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
 673                         ch->defio.delay = msecs_to_jiffies(tmp);
 674                         ch->info->fbdefio = &ch->defio;
 675                         fb_deferred_io_init(ch->info);
 676
 677                         /* one-shot mode */
 678                         lcdc_write_chan(ch, LDSM1R, 1);
 679
 680                         /* enable "Frame End Interrupt Enable" bit */
 681                         lcdc_write(priv, _LDINTR, LDINTR_FE);
 682
 683                 } else {
 684                         /* continuous read mode */
 685                         lcdc_write_chan(ch, LDSM1R, 0);
 686                 }
 687         }
 688
 689         /* display output */
 690         lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
 691
 692         /* start the lcdc */
 693         sh_mobile_lcdc_start_stop(priv, 1);
 694         priv->started = 1;
 695
 696         /* tell the board code to enable the panel */
 697         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 698                 ch = &priv->ch[k];
 699                 if (!ch->enabled)
 700                         continue;
 701
 702                 board_cfg = &ch->cfg.board_cfg;
 703                 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
 704                         board_cfg->display_on(board_cfg->board_data, ch->info);
 705                         module_put(board_cfg->owner);
 706                 }
 707
 708                 if (ch->bl) {
 709                         ch->bl->props.power = FB_BLANK_UNBLANK;
 710                         backlight_update_status(ch->bl);
 711                 }
 712         }
 713
 714         return 0;
 715 }
 716
 717 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
 718 {
 719         struct sh_mobile_lcdc_chan *ch;
 720         struct sh_mobile_lcdc_board_cfg *board_cfg;
 721         int k;
 722
 723         /* clean up deferred io and ask board code to disable panel */
 724         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 725                 ch = &priv->ch[k];
 726                 if (!ch->enabled)
 727                         continue;
 728
 729                 /* deferred io mode:
 730                  * flush frame, and wait for frame end interrupt
 731                  * clean up deferred io and enable clock
 732                  */
 733                 if (ch->info && ch->info->fbdefio) {
 734                         ch->frame_end = 0;
 735                         schedule_delayed_work(&ch->info->deferred_work, 0);
 736                         wait_event(ch->frame_end_wait, ch->frame_end);
 737                         fb_deferred_io_cleanup(ch->info);
 738                         ch->info->fbdefio = NULL;
 739                         sh_mobile_lcdc_clk_on(priv);
 740                 }
 741
 742                 if (ch->bl) {
 743                         ch->bl->props.power = FB_BLANK_POWERDOWN;
 744                         backlight_update_status(ch->bl);
 745                 }
 746
 747                 board_cfg = &ch->cfg.board_cfg;
 748                 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
 749                         board_cfg->display_off(board_cfg->board_data);
 750                         module_put(board_cfg->owner);
 751                 }
 752
 753                 /* disable the meram */
 754                 if (ch->meram_enabled) {
 755                         struct sh_mobile_meram_cfg *cfg;
 756                         struct sh_mobile_meram_info *mdev;
 757                         cfg = ch->cfg.meram_cfg;
 758                         mdev = priv->meram_dev;
 759                         mdev->ops->meram_unregister(mdev, cfg);
 760                         ch->meram_enabled = 0;
 761                 }
 762
 763         }
 764
 765         /* stop the lcdc */
 766         if (priv->started) {
 767                 sh_mobile_lcdc_start_stop(priv, 0);
 768                 priv->started = 0;
 769         }
 770
 771         /* stop clocks */
 772         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 773                 if (priv->ch[k].enabled)
 774                         sh_mobile_lcdc_clk_off(priv);
 775 }
 776
 777 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
 778 {
 779         int ifm, miftyp;
 780
 781         switch (ch->cfg.interface_type) {
 782         case RGB8: ifm = 0; miftyp = 0; break;
 783         case RGB9: ifm = 0; miftyp = 4; break;
 784         case RGB12A: ifm = 0; miftyp = 5; break;
 785         case RGB12B: ifm = 0; miftyp = 6; break;
 786         case RGB16: ifm = 0; miftyp = 7; break;
 787         case RGB18: ifm = 0; miftyp = 10; break;
 788         case RGB24: ifm = 0; miftyp = 11; break;
 789         case SYS8A: ifm = 1; miftyp = 0; break;
 790         case SYS8B: ifm = 1; miftyp = 1; break;
 791         case SYS8C: ifm = 1; miftyp = 2; break;
 792         case SYS8D: ifm = 1; miftyp = 3; break;
 793         case SYS9: ifm = 1; miftyp = 4; break;
 794         case SYS12: ifm = 1; miftyp = 5; break;
 795         case SYS16A: ifm = 1; miftyp = 7; break;
 796         case SYS16B: ifm = 1; miftyp = 8; break;
 797         case SYS16C: ifm = 1; miftyp = 9; break;
 798         case SYS18: ifm = 1; miftyp = 10; break;
 799         case SYS24: ifm = 1; miftyp = 11; break;
 800         default: goto bad;
 801         }
 802
 803         /* SUBLCD only supports SYS interface */
 804         if (lcdc_chan_is_sublcd(ch)) {
 805                 if (ifm == 0)
 806                         goto bad;
 807                 else
 808                         ifm = 0;
 809         }
 810
 811         ch->ldmt1r_value = (ifm << 12) | miftyp;
 812         return 0;
 813  bad:
 814         return -EINVAL;
 815 }
 816
 817 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
 818                                        int clock_source,
 819                                        struct sh_mobile_lcdc_priv *priv)
 820 {
 821         char *str;
 822         int icksel;
 823
 824         switch (clock_source) {
 825         case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
 826         case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
 827         case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
 828         default:
 829                 return -EINVAL;
 830         }
 831
 832         priv->lddckr = icksel << 16;
 833
 834         if (str) {
 835                 priv->dot_clk = clk_get(&pdev->dev, str);
 836                 if (IS_ERR(priv->dot_clk)) {
 837                         dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
 838                         return PTR_ERR(priv->dot_clk);
 839                 }
 840         }
 841
 842         /* Runtime PM support involves two step for this driver:
 843          * 1) Enable Runtime PM
 844          * 2) Force Runtime PM Resume since hardware is accessed from probe()
 845          */
 846         priv->dev = &pdev->dev;
 847         pm_runtime_enable(priv->dev);
 848         pm_runtime_resume(priv->dev);
 849         return 0;
 850 }
 851
 852 static int sh_mobile_lcdc_setcolreg(u_int regno,
 853                                     u_int red, u_int green, u_int blue,
 854                                     u_int transp, struct fb_info *info)
 855 {
 856         u32 *palette = info->pseudo_palette;
 857
 858         if (regno >= PALETTE_NR)
 859                 return -EINVAL;
 860
 861         /* only FB_VISUAL_TRUECOLOR supported */
 862
 863         red >>= 16 - info->var.red.length;
 864         green >>= 16 - info->var.green.length;
 865         blue >>= 16 - info->var.blue.length;
 866         transp >>= 16 - info->var.transp.length;
 867
 868         palette[regno] = (red << info->var.red.offset) |
 869           (green << info->var.green.offset) |
 870           (blue << info->var.blue.offset) |
 871           (transp << info->var.transp.offset);
 872
 873         return 0;
 874 }
 875
 876 static struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
 877         .id =           "SH Mobile LCDC",
 878         .type =         FB_TYPE_PACKED_PIXELS,
 879         .visual =       FB_VISUAL_TRUECOLOR,
 880         .accel =        FB_ACCEL_NONE,
 881         .xpanstep =     0,
 882         .ypanstep =     1,
 883         .ywrapstep =    0,
 884 };
 885
 886 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
 887                                     const struct fb_fillrect *rect)
 888 {
 889         sys_fillrect(info, rect);
 890         sh_mobile_lcdc_deferred_io_touch(info);
 891 }
 892
 893 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
 894                                     const struct fb_copyarea *area)
 895 {
 896         sys_copyarea(info, area);
 897         sh_mobile_lcdc_deferred_io_touch(info);
 898 }
 899
 900 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
 901                                      const struct fb_image *image)
 902 {
 903         sys_imageblit(info, image);
 904         sh_mobile_lcdc_deferred_io_touch(info);
 905 }
 906
 907 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
 908                                      struct fb_info *info)
 909 {
 910         struct sh_mobile_lcdc_chan *ch = info->par;
 911         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
 912         unsigned long ldrcntr;
 913         unsigned long new_pan_offset;
 914         unsigned long base_addr_y, base_addr_c;
 915         unsigned long c_offset;
 916
 917         if (!var->nonstd)
 918                 new_pan_offset = (var->yoffset * info->fix.line_length) +
 919                         (var->xoffset * (info->var.bits_per_pixel / 8));
 920         else
 921                 new_pan_offset = (var->yoffset * info->fix.line_length) +
 922                         (var->xoffset);
 923
 924         if (new_pan_offset == ch->pan_offset)
 925                 return 0;       /* No change, do nothing */
 926
 927         ldrcntr = lcdc_read(priv, _LDRCNTR);
 928
 929         /* Set the source address for the next refresh */
 930         base_addr_y = ch->dma_handle + new_pan_offset;
 931         if (var->nonstd) {
 932                 /* Set y offset */
 933                 c_offset = (var->yoffset *
 934                         info->fix.line_length *
 935                         (info->var.bits_per_pixel - 8)) / 8;
 936                 base_addr_c = ch->dma_handle + var->xres * var->yres_virtual +
 937                         c_offset;
 938                 /* Set x offset */
 939                 if (info->var.bits_per_pixel == 24)
 940                         base_addr_c += 2 * var->xoffset;
 941                 else
 942                         base_addr_c += var->xoffset;
 943         } else
 944                 base_addr_c = 0;
 945
 946         if (!ch->meram_enabled) {
 947                 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
 948                 if (base_addr_c)
 949                         lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
 950         } else {
 951                 struct sh_mobile_meram_cfg *cfg;
 952                 struct sh_mobile_meram_info *mdev;
 953                 unsigned long icb_addr_y, icb_addr_c;
 954                 int ret;
 955
 956                 cfg = ch->cfg.meram_cfg;
 957                 mdev = priv->meram_dev;
 958                 ret = mdev->ops->meram_update(mdev, cfg,
 959                                         base_addr_y, base_addr_c,
 960                                         &icb_addr_y, &icb_addr_c);
 961                 if (ret)
 962                         return ret;
 963
 964                 lcdc_write_chan_mirror(ch, LDSA1R, icb_addr_y);
 965                 if (icb_addr_c)
 966                         lcdc_write_chan_mirror(ch, LDSA2R, icb_addr_c);
 967
 968         }
 969
 970         if (lcdc_chan_is_sublcd(ch))
 971                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
 972         else
 973                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
 974
 975         ch->pan_offset = new_pan_offset;
 976
 977         sh_mobile_lcdc_deferred_io_touch(info);
 978
 979         return 0;
 980 }
 981
 982 static int sh_mobile_wait_for_vsync(struct fb_info *info)
 983 {
 984         struct sh_mobile_lcdc_chan *ch = info->par;
 985         unsigned long ldintr;
 986         int ret;
 987
 988         /* Enable VSync End interrupt */
 989         ldintr = lcdc_read(ch->lcdc, _LDINTR);
 990         ldintr |= LDINTR_VEE;
 991         lcdc_write(ch->lcdc, _LDINTR, ldintr);
 992
 993         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 994                                                         msecs_to_jiffies(100));
 995         if (!ret)
 996                 return -ETIMEDOUT;
 997
 998         return 0;
 999 }
1000
1001 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
1002                        unsigned long arg)
1003 {
1004         int retval;
1005
1006         switch (cmd) {
1007         case FBIO_WAITFORVSYNC:
1008                 retval = sh_mobile_wait_for_vsync(info);
1009                 break;
1010
1011         default:
1012                 retval = -ENOIOCTLCMD;
1013                 break;
1014         }
1015         return retval;
1016 }
1017
1018 static void sh_mobile_fb_reconfig(struct fb_info *info)
1019 {
1020         struct sh_mobile_lcdc_chan *ch = info->par;
1021         struct fb_videomode mode1, mode2;
1022         struct fb_event event;
1023         int evnt = FB_EVENT_MODE_CHANGE_ALL;
1024
1025         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1026                 /* More framebuffer users are active */
1027                 return;
1028
1029         fb_var_to_videomode(&mode1, &ch->display_var);
1030         fb_var_to_videomode(&mode2, &info->var);
1031
1032         if (fb_mode_is_equal(&mode1, &mode2))
1033                 return;
1034
1035         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1036         if (fb_set_var(info, &ch->display_var) < 0)
1037                 /* Couldn't reconfigure, hopefully, can continue as before */
1038                 return;
1039
1040         if (info->var.nonstd)
1041                 info->fix.line_length = mode1.xres;
1042         else
1043                 info->fix.line_length = mode1.xres * (ch->cfg.bpp / 8);
1044
1045         /*
1046          * fb_set_var() calls the notifier change internally, only if
1047          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1048          * user event, we have to call the chain ourselves.
1049          */
1050         event.info = info;
1051         event.data = &mode1;
1052         fb_notifier_call_chain(evnt, &event);
1053 }
1054
1055 /*
1056  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1057  * user == 1, or with console sem held, if user == 0.
1058  */
1059 static int sh_mobile_release(struct fb_info *info, int user)
1060 {
1061         struct sh_mobile_lcdc_chan *ch = info->par;
1062
1063         mutex_lock(&ch->open_lock);
1064         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1065
1066         ch->use_count--;
1067
1068         /* Nothing to reconfigure, when called from fbcon */
1069         if (user) {
1070                 console_lock();
1071                 sh_mobile_fb_reconfig(info);
1072                 console_unlock();
1073         }
1074
1075         mutex_unlock(&ch->open_lock);
1076
1077         return 0;
1078 }
1079
1080 static int sh_mobile_open(struct fb_info *info, int user)
1081 {
1082         struct sh_mobile_lcdc_chan *ch = info->par;
1083
1084         mutex_lock(&ch->open_lock);
1085         ch->use_count++;
1086
1087         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1088         mutex_unlock(&ch->open_lock);
1089
1090         return 0;
1091 }
1092
1093 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
1094 {
1095         struct sh_mobile_lcdc_chan *ch = info->par;
1096         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1097
1098         if (var->xres > MAX_XRES || var->yres > MAX_YRES ||
1099             var->xres * var->yres * (ch->cfg.bpp / 8) * 2 > info->fix.smem_len) {
1100                 dev_warn(info->dev, "Invalid info: %u-%u-%u-%u x %u-%u-%u-%u @ %lukHz!\n",
1101                          var->left_margin, var->xres, var->right_margin, var->hsync_len,
1102                          var->upper_margin, var->yres, var->lower_margin, var->vsync_len,
1103                          PICOS2KHZ(var->pixclock));
1104                 return -EINVAL;
1105         }
1106
1107         /* only accept the forced_bpp for dual channel configurations */
1108         if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel)
1109                 return -EINVAL;
1110
1111         switch (var->bits_per_pixel) {
1112         case 16: /* PKF[4:0] = 00011 - RGB 565 */
1113         case 24: /* PKF[4:0] = 01011 - RGB 888 */
1114         case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1115                 break;
1116         default:
1117                 return -EINVAL;
1118         }
1119
1120         return 0;
1121 }
1122
1123 /*
1124  * Screen blanking. Behavior is as follows:
1125  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1126  * FB_BLANK_NORMAL: screen blanked, clocks enabled
1127  * FB_BLANK_VSYNC,
1128  * FB_BLANK_HSYNC,
1129  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1130  */
1131 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1132 {
1133         struct sh_mobile_lcdc_chan *ch = info->par;
1134         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1135
1136         /* blank the screen? */
1137         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1138                 struct fb_fillrect rect = {
1139                         .width = info->var.xres,
1140                         .height = info->var.yres,
1141                 };
1142                 sh_mobile_lcdc_fillrect(info, &rect);
1143         }
1144         /* turn clocks on? */
1145         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1146                 sh_mobile_lcdc_clk_on(p);
1147         }
1148         /* turn clocks off? */
1149         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1150                 /* make sure the screen is updated with the black fill before
1151                  * switching the clocks off. one vsync is not enough since
1152                  * blanking may occur in the middle of a refresh. deferred io
1153                  * mode will reenable the clocks and update the screen in time,
1154                  * so it does not need this. */
1155                 if (!info->fbdefio) {
1156                         sh_mobile_wait_for_vsync(info);
1157                         sh_mobile_wait_for_vsync(info);
1158                 }
1159                 sh_mobile_lcdc_clk_off(p);
1160         }
1161
1162         ch->blank_status = blank;
1163         return 0;
1164 }
1165
1166 static struct fb_ops sh_mobile_lcdc_ops = {
1167         .owner          = THIS_MODULE,
1168         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
1169         .fb_read        = fb_sys_read,
1170         .fb_write       = fb_sys_write,
1171         .fb_fillrect    = sh_mobile_lcdc_fillrect,
1172         .fb_copyarea    = sh_mobile_lcdc_copyarea,
1173         .fb_imageblit   = sh_mobile_lcdc_imageblit,
1174         .fb_blank       = sh_mobile_lcdc_blank,
1175         .fb_pan_display = sh_mobile_fb_pan_display,
1176         .fb_ioctl       = sh_mobile_ioctl,
1177         .fb_open        = sh_mobile_open,
1178         .fb_release     = sh_mobile_release,
1179         .fb_check_var   = sh_mobile_check_var,
1180 };
1181
1182 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
1183 {
1184         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1185         struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1186         int brightness = bdev->props.brightness;
1187
1188         if (bdev->props.power != FB_BLANK_UNBLANK ||
1189             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
1190                 brightness = 0;
1191
1192         return cfg->set_brightness(cfg->board_data, brightness);
1193 }
1194
1195 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
1196 {
1197         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1198         struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1199
1200         return cfg->get_brightness(cfg->board_data);
1201 }
1202
1203 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
1204                                    struct fb_info *info)
1205 {
1206         return (info->bl_dev == bdev);
1207 }
1208
1209 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
1210         .options        = BL_CORE_SUSPENDRESUME,
1211         .update_status  = sh_mobile_lcdc_update_bl,
1212         .get_brightness = sh_mobile_lcdc_get_brightness,
1213         .check_fb       = sh_mobile_lcdc_check_fb,
1214 };
1215
1216 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
1217                                                struct sh_mobile_lcdc_chan *ch)
1218 {
1219         struct backlight_device *bl;
1220
1221         bl = backlight_device_register(ch->cfg.bl_info.name, parent, ch,
1222                                        &sh_mobile_lcdc_bl_ops, NULL);
1223         if (IS_ERR(bl)) {
1224                 dev_err(parent, "unable to register backlight device: %ld\n",
1225                         PTR_ERR(bl));
1226                 return NULL;
1227         }
1228
1229         bl->props.max_brightness = ch->cfg.bl_info.max_brightness;
1230         bl->props.brightness = bl->props.max_brightness;
1231         backlight_update_status(bl);
1232
1233         return bl;
1234 }
1235
1236 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
1237 {
1238         backlight_device_unregister(bdev);
1239 }
1240
1241 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp,
1242                                    int nonstd)
1243 {
1244         if (nonstd) {
1245                 switch (bpp) {
1246                 case 12:
1247                 case 16:
1248                 case 24:
1249                         var->bits_per_pixel = bpp;
1250                         var->nonstd = nonstd;
1251                         return 0;
1252                 default:
1253                         return -EINVAL;
1254                 }
1255         }
1256
1257         switch (bpp) {
1258         case 16: /* PKF[4:0] = 00011 - RGB 565 */
1259                 var->red.offset = 11;
1260                 var->red.length = 5;
1261                 var->green.offset = 5;
1262                 var->green.length = 6;
1263                 var->blue.offset = 0;
1264                 var->blue.length = 5;
1265                 var->transp.offset = 0;
1266                 var->transp.length = 0;
1267                 break;
1268
1269         case 24: /* PKF[4:0] = 01011 - RGB 888 */
1270                 var->red.offset = 16;
1271                 var->red.length = 8;
1272                 var->green.offset = 8;
1273                 var->green.length = 8;
1274                 var->blue.offset = 0;
1275                 var->blue.length = 8;
1276                 var->transp.offset = 0;
1277                 var->transp.length = 0;
1278                 break;
1279
1280         case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1281                 var->red.offset = 16;
1282                 var->red.length = 8;
1283                 var->green.offset = 8;
1284                 var->green.length = 8;
1285                 var->blue.offset = 0;
1286                 var->blue.length = 8;
1287                 var->transp.offset = 24;
1288                 var->transp.length = 8;
1289                 break;
1290         default:
1291                 return -EINVAL;
1292         }
1293         var->bits_per_pixel = bpp;
1294         var->red.msb_right = 0;
1295         var->green.msb_right = 0;
1296         var->blue.msb_right = 0;
1297         var->transp.msb_right = 0;
1298         return 0;
1299 }
1300
1301 static int sh_mobile_lcdc_suspend(struct device *dev)
1302 {
1303         struct platform_device *pdev = to_platform_device(dev);
1304
1305         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1306         return 0;
1307 }
1308
1309 static int sh_mobile_lcdc_resume(struct device *dev)
1310 {
1311         struct platform_device *pdev = to_platform_device(dev);
1312
1313         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1314 }
1315
1316 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1317 {
1318         struct platform_device *pdev = to_platform_device(dev);
1319         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1320         struct sh_mobile_lcdc_chan *ch;
1321         int k, n;
1322
1323         /* save per-channel registers */
1324         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1325                 ch = &p->ch[k];
1326                 if (!ch->enabled)
1327                         continue;
1328                 for (n = 0; n < NR_CH_REGS; n++)
1329                         ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
1330         }
1331
1332         /* save shared registers */
1333         for (n = 0; n < NR_SHARED_REGS; n++)
1334                 p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
1335
1336         /* turn off LCDC hardware */
1337         lcdc_write(p, _LDCNT1R, 0);
1338         return 0;
1339 }
1340
1341 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1342 {
1343         struct platform_device *pdev = to_platform_device(dev);
1344         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1345         struct sh_mobile_lcdc_chan *ch;
1346         int k, n;
1347
1348         /* restore per-channel registers */
1349         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1350                 ch = &p->ch[k];
1351                 if (!ch->enabled)
1352                         continue;
1353                 for (n = 0; n < NR_CH_REGS; n++)
1354                         lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
1355         }
1356
1357         /* restore shared registers */
1358         for (n = 0; n < NR_SHARED_REGS; n++)
1359                 lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
1360
1361         return 0;
1362 }
1363
1364 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1365         .suspend = sh_mobile_lcdc_suspend,
1366         .resume = sh_mobile_lcdc_resume,
1367         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1368         .runtime_resume = sh_mobile_lcdc_runtime_resume,
1369 };
1370
1371 /* locking: called with info->lock held */
1372 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1373                                  unsigned long action, void *data)
1374 {
1375         struct fb_event *event = data;
1376         struct fb_info *info = event->info;
1377         struct sh_mobile_lcdc_chan *ch = info->par;
1378         struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1379         int ret;
1380
1381         if (&ch->lcdc->notifier != nb)
1382                 return NOTIFY_DONE;
1383
1384         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1385                 __func__, action, event->data);
1386
1387         switch(action) {
1388         case FB_EVENT_SUSPEND:
1389                 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
1390                         board_cfg->display_off(board_cfg->board_data);
1391                         module_put(board_cfg->owner);
1392                 }
1393                 pm_runtime_put(info->device);
1394                 sh_mobile_lcdc_stop(ch->lcdc);
1395                 break;
1396         case FB_EVENT_RESUME:
1397                 mutex_lock(&ch->open_lock);
1398                 sh_mobile_fb_reconfig(info);
1399                 mutex_unlock(&ch->open_lock);
1400
1401                 /* HDMI must be enabled before LCDC configuration */
1402                 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
1403                         board_cfg->display_on(board_cfg->board_data, info);
1404                         module_put(board_cfg->owner);
1405                 }
1406
1407                 ret = sh_mobile_lcdc_start(ch->lcdc);
1408                 if (!ret)
1409                         pm_runtime_get_sync(info->device);
1410         }
1411
1412         return NOTIFY_OK;
1413 }
1414
1415 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
1416
1417 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1418 {
1419         struct fb_info *info;
1420         struct sh_mobile_lcdc_priv *priv;
1421         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1422         struct resource *res;
1423         int error;
1424         void *buf;
1425         int i, j;
1426
1427         if (!pdata) {
1428                 dev_err(&pdev->dev, "no platform data defined\n");
1429                 return -EINVAL;
1430         }
1431
1432         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1433         i = platform_get_irq(pdev, 0);
1434         if (!res || i < 0) {
1435                 dev_err(&pdev->dev, "cannot get platform resources\n");
1436                 return -ENOENT;
1437         }
1438
1439         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1440         if (!priv) {
1441                 dev_err(&pdev->dev, "cannot allocate device data\n");
1442                 return -ENOMEM;
1443         }
1444
1445         platform_set_drvdata(pdev, priv);
1446
1447         error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
1448                             dev_name(&pdev->dev), priv);
1449         if (error) {
1450                 dev_err(&pdev->dev, "unable to request irq\n");
1451                 goto err1;
1452         }
1453
1454         priv->irq = i;
1455         atomic_set(&priv->hw_usecnt, -1);
1456
1457         j = 0;
1458         for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1459                 struct sh_mobile_lcdc_chan *ch = priv->ch + j;
1460
1461                 ch->lcdc = priv;
1462                 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1463
1464                 error = sh_mobile_lcdc_check_interface(ch);
1465                 if (error) {
1466                         dev_err(&pdev->dev, "unsupported interface type\n");
1467                         goto err1;
1468                 }
1469                 init_waitqueue_head(&ch->frame_end_wait);
1470                 init_completion(&ch->vsync_completion);
1471                 ch->pan_offset = 0;
1472
1473                 /* probe the backlight is there is one defined */
1474                 if (ch->cfg.bl_info.max_brightness)
1475                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
1476
1477                 switch (pdata->ch[i].chan) {
1478                 case LCDC_CHAN_MAINLCD:
1479                         ch->enabled = 1 << 1;
1480                         ch->reg_offs = lcdc_offs_mainlcd;
1481                         j++;
1482                         break;
1483                 case LCDC_CHAN_SUBLCD:
1484                         ch->enabled = 1 << 2;
1485                         ch->reg_offs = lcdc_offs_sublcd;
1486                         j++;
1487                         break;
1488                 }
1489         }
1490
1491         if (!j) {
1492                 dev_err(&pdev->dev, "no channels defined\n");
1493                 error = -EINVAL;
1494                 goto err1;
1495         }
1496
1497         /* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
1498         if (j == 2)
1499                 priv->forced_bpp = pdata->ch[0].bpp;
1500
1501         priv->base = ioremap_nocache(res->start, resource_size(res));
1502         if (!priv->base)
1503                 goto err1;
1504
1505         error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1506         if (error) {
1507                 dev_err(&pdev->dev, "unable to setup clocks\n");
1508                 goto err1;
1509         }
1510
1511         priv->meram_dev = pdata->meram_dev;
1512
1513         for (i = 0; i < j; i++) {
1514                 struct fb_var_screeninfo *var;
1515                 const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
1516                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1517                 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1518                 const struct fb_videomode *mode = cfg->lcd_cfg;
1519                 unsigned long max_size = 0;
1520                 int k;
1521                 int num_cfg;
1522
1523                 ch->info = framebuffer_alloc(0, &pdev->dev);
1524                 if (!ch->info) {
1525                         dev_err(&pdev->dev, "unable to allocate fb_info\n");
1526                         error = -ENOMEM;
1527                         break;
1528                 }
1529
1530                 info = ch->info;
1531                 var = &info->var;
1532                 info->fbops = &sh_mobile_lcdc_ops;
1533                 info->par = ch;
1534
1535                 mutex_init(&ch->open_lock);
1536
1537                 for (k = 0, lcd_cfg = mode;
1538                      k < cfg->num_cfg && lcd_cfg;
1539                      k++, lcd_cfg++) {
1540                         unsigned long size = lcd_cfg->yres * lcd_cfg->xres;
1541                         /* NV12 buffers must have even number of lines */
1542                         if ((cfg->nonstd) && cfg->bpp == 12 &&
1543                                         (lcd_cfg->yres & 0x1)) {
1544                                 dev_err(&pdev->dev, "yres must be multiple of 2"
1545                                                 " for YCbCr420 mode.\n");
1546                                 error = -EINVAL;
1547                                 goto err1;
1548                         }
1549
1550                         if (size > max_size) {
1551                                 max_cfg = lcd_cfg;
1552                                 max_size = size;
1553                         }
1554                 }
1555
1556                 if (!mode)
1557                         max_size = MAX_XRES * MAX_YRES;
1558                 else if (max_cfg)
1559                         dev_dbg(&pdev->dev, "Found largest videomode %ux%u\n",
1560                                 max_cfg->xres, max_cfg->yres);
1561
1562                 info->fix = sh_mobile_lcdc_fix;
1563                 info->fix.smem_len = max_size * 2 * cfg->bpp / 8;
1564
1565                  /* Only pan in 2 line steps for NV12 */
1566                 if (cfg->nonstd && cfg->bpp == 12)
1567                         info->fix.ypanstep = 2;
1568
1569                 if (!mode) {
1570                         mode = &default_720p;
1571                         num_cfg = 1;
1572                 } else {
1573                         num_cfg = cfg->num_cfg;
1574                 }
1575
1576                 fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1577
1578                 fb_videomode_to_var(var, mode);
1579                 var->width = cfg->lcd_size_cfg.width;
1580                 var->height = cfg->lcd_size_cfg.height;
1581                 /* Default Y virtual resolution is 2x panel size */
1582                 var->yres_virtual = var->yres * 2;
1583                 var->activate = FB_ACTIVATE_NOW;
1584
1585                 error = sh_mobile_lcdc_set_bpp(var, cfg->bpp, cfg->nonstd);
1586                 if (error)
1587                         break;
1588
1589                 buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
1590                                          &ch->dma_handle, GFP_KERNEL);
1591                 if (!buf) {
1592                         dev_err(&pdev->dev, "unable to allocate buffer\n");
1593                         error = -ENOMEM;
1594                         break;
1595                 }
1596
1597                 info->pseudo_palette = &ch->pseudo_palette;
1598                 info->flags = FBINFO_FLAG_DEFAULT;
1599
1600                 error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1601                 if (error < 0) {
1602                         dev_err(&pdev->dev, "unable to allocate cmap\n");
1603                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1604                                           buf, ch->dma_handle);
1605                         break;
1606                 }
1607
1608                 info->fix.smem_start = ch->dma_handle;
1609                 if (var->nonstd)
1610                         info->fix.line_length = var->xres;
1611                 else
1612                         info->fix.line_length = var->xres * (cfg->bpp / 8);
1613
1614                 info->screen_base = buf;
1615                 info->device = &pdev->dev;
1616                 ch->display_var = *var;
1617         }
1618
1619         if (error)
1620                 goto err1;
1621
1622         error = sh_mobile_lcdc_start(priv);
1623         if (error) {
1624                 dev_err(&pdev->dev, "unable to start hardware\n");
1625                 goto err1;
1626         }
1627
1628         for (i = 0; i < j; i++) {
1629                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1630
1631                 info = ch->info;
1632
1633                 if (info->fbdefio) {
1634                         ch->sglist = vmalloc(sizeof(struct scatterlist) *
1635                                         info->fix.smem_len >> PAGE_SHIFT);
1636                         if (!ch->sglist) {
1637                                 dev_err(&pdev->dev, "cannot allocate sglist\n");
1638                                 goto err1;
1639                         }
1640                 }
1641
1642                 info->bl_dev = ch->bl;
1643
1644                 error = register_framebuffer(info);
1645                 if (error < 0)
1646                         goto err1;
1647
1648                 dev_info(info->dev,
1649                          "registered %s/%s as %dx%d %dbpp.\n",
1650                          pdev->name,
1651                          (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1652                          "mainlcd" : "sublcd",
1653                          info->var.xres, info->var.yres,
1654                          ch->cfg.bpp);
1655
1656                 /* deferred io mode: disable clock to save power */
1657                 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1658                         sh_mobile_lcdc_clk_off(priv);
1659         }
1660
1661         /* Failure ignored */
1662         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1663         fb_register_client(&priv->notifier);
1664
1665         return 0;
1666 err1:
1667         sh_mobile_lcdc_remove(pdev);
1668
1669         return error;
1670 }
1671
1672 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1673 {
1674         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1675         struct fb_info *info;
1676         int i;
1677
1678         fb_unregister_client(&priv->notifier);
1679
1680         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1681                 if (priv->ch[i].info && priv->ch[i].info->dev)
1682                         unregister_framebuffer(priv->ch[i].info);
1683
1684         sh_mobile_lcdc_stop(priv);
1685
1686         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1687                 info = priv->ch[i].info;
1688
1689                 if (!info || !info->device)
1690                         continue;
1691
1692                 if (priv->ch[i].sglist)
1693                         vfree(priv->ch[i].sglist);
1694
1695                 if (info->screen_base)
1696                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1697                                           info->screen_base,
1698                                           priv->ch[i].dma_handle);
1699                 fb_dealloc_cmap(&info->cmap);
1700                 framebuffer_release(info);
1701         }
1702
1703         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1704                 if (priv->ch[i].bl)
1705                         sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
1706         }
1707
1708         if (priv->dot_clk)
1709                 clk_put(priv->dot_clk);
1710
1711         if (priv->dev)
1712                 pm_runtime_disable(priv->dev);
1713
1714         if (priv->base)
1715                 iounmap(priv->base);
1716
1717         if (priv->irq)
1718                 free_irq(priv->irq, priv);
1719         kfree(priv);
1720         return 0;
1721 }
1722
1723 static struct platform_driver sh_mobile_lcdc_driver = {
1724         .driver         = {
1725                 .name           = "sh_mobile_lcdc_fb",
1726                 .owner          = THIS_MODULE,
1727                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
1728         },
1729         .probe          = sh_mobile_lcdc_probe,
1730         .remove         = sh_mobile_lcdc_remove,
1731 };
1732
1733 static int __init sh_mobile_lcdc_init(void)
1734 {
1735         return platform_driver_register(&sh_mobile_lcdc_driver);
1736 }
1737
1738 static void __exit sh_mobile_lcdc_exit(void)
1739 {
1740         platform_driver_unregister(&sh_mobile_lcdc_driver);
1741 }
1742
1743 module_init(sh_mobile_lcdc_init);
1744 module_exit(sh_mobile_lcdc_exit);
1745
1746 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1747 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1748 MODULE_LICENSE("GPL v2");